diff --git a/README.md b/README.md
index 26237f0..94b690b 100644
--- a/README.md
+++ b/README.md
@@ -35,12 +35,12 @@ We want the following files and folders to be delivered in a ZIP file:
 
 To automatically make an archive (`source.zip`) ready for uploading to blackboard:
 
-* Make sure any extra assets or resources you have might have added are located in the `resources` folder
+* Make sure any extra assets or resources you might have added are located in the `resources` folder
 * Then run either:
-	* `create_code_archive_for_blackboard_LINUX.sh`
+	* `./create_code_archive_for_blackboard_LINUX.sh`
 	* `create_code_archive_for_blackboard_WINDOWS.bat`.
 
-This script will explicitly ignore the `target` folder, and two files given as a handout for exercise 3, to save space:
+This zip script will explicitly ignore the `target` folder, and the following two of the files given as a handout for exercise 3 (just to save space):
 
 * `resources/helicopter.obj`
 * `resources/lunarsurface.obj`
diff --git a/src/main.rs b/src/main.rs
index cd97a80..9e5ed4a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -159,13 +159,13 @@ fn main() {
 
         // The main rendering loop
         let first_frame_time = std::time::Instant::now();
-        let mut prevous_frame_time = first_frame_time;
+        let mut previous_frame_time = first_frame_time;
         loop {
             // Compute time passed since the previous frame and since the start of the program
             let now = std::time::Instant::now();
             let elapsed = now.duration_since(first_frame_time).as_secs_f32();
-            let delta_time = now.duration_since(prevous_frame_time).as_secs_f32();
-            prevous_frame_time = now;
+            let delta_time = now.duration_since(previous_frame_time).as_secs_f32();
+            previous_frame_time = now;
 
             // Handle resize events
             if let Ok(mut new_size) = window_size.lock() {
@@ -201,7 +201,7 @@ fn main() {
             // Handle mouse movement. delta contains the x and y movement of the mouse since last frame in pixels
             if let Ok(mut delta) = mouse_delta.lock() {
 
-                // == // Optionally access the acumulated mouse movement between
+                // == // Optionally access the accumulated mouse movement between
                 // == // frames here with `delta.0` and `delta.1`
 
                 *delta = (0.0, 0.0); // reset when done